S7 Galaxy - Some pictures gone from phone storage

[stacr]

The phone and SD card storage are almost full, but I do delete as much as I can until I swap out the SD card.
I was going through some pictures to clean up and noticed that a few hundred photos are gone from the phone's storage.

They are saved on Google Photos, but I'd like to know where they went from the phone.

 

[Rukbat]

To Google Photos, the cloud site. You can download them to the phone, but why fill the phone up when they're as close as the internet?